HomeMy WebLinkAboutSW4 SE4 & N2 NE4 S7938T14 RIW
Sec. 24 SW4 SE4
161
Sec. 25 N2 NE4
5-7938
Expired 1-10-88
CASE NUMBER:
S-7938
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MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION
Environmental Health Division?.
CASE REVIEW WORKSHEET
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DATE RECEIVED:
November 29, 1984
COMMENTS DUE BY:
December 17, 1984
SUBDIVISION OR PROJECT TITLE:
Lots 1 - 13, Tracts A, B South Slope Subdivision
( PUBLIC WATER AVAILABLE
( ) COMMUNITY WATER AVAILABLE
( PUBLIC SEWER AVAILABLE
COMMENTS:
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TRYCKHead Office 1 740 1 Street Anchorage, Alaska 99501 1907-279-0543 ! Telex 090-25332
NYMAN
&&AYES
ENGINEERS/PLANNERS/SURVEYORS
0000.0
December 20, 1984
Department of Health and Environmental Protection
825 "L" Street
Anchorage, Alaska 99501
ATTENTION: John Lin
RE: South Slope Subdivision
Mr. Lin:
Attached are two copies of the Concept Plan for South Slope Subdivision. We
have marked suitable leach field locations (in green) on each drawing.
As you can see each leach field location was chosen using several standard
criteria:
1) Natural Slopes that of under 25%
2) Areas not natural in drainage courses
3) Areas accessable to the house
4) Areas allowing gravity flow
Each lot has been provided with at least two leach field locations. Where
natural conditions of a lot did not permit all of the above criteria to be met,
areas that could be easily modified have been chosen.
It should also be noted that the locations shown are many times the area
necessary for a successful absorbation area. The leach field itself could be
located anywhere within any of these large areas.
With the large suitabAe areas available and good soil conditions we foresee no
problem with on sit astewater disposal.
S
Design
& HAYES
DH/sky
OVER 30 YEARS SERVICE TO ALASKA
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SUBDIVISI N REIVIEW /
Case 1! Subdivisionso al { S -e Zoned � v Date '
WASTEWATER DISPOSAL ��
Public Sewer Community Onsite Sewer �' Single-family Onsite
Soil tests stamped by engineer, signed, dated, identified, etc.;
Sufficient soil tests to characterize minimum of 50% of subdivision
in probable absorption field areas;
Soil test locations accurately identified;
Perc test data adequate;
Groundwater monitored for 90 days, with last month occurring
between June 1 and October 15;
Accurate topographic map;
Slope <25% in general region of original and replacement sites;
D.E.C. approval of community system plans (if applicable);
Bedrock outcroppings or shallow depth to bedrock;
Sufficient setback from creeks, major drainages, other water bodies;
Sufficient setback from cutbank or bluff;
Sufficient setback from probable private well locations;
Sufficient setback from community well(s);
Sufficient setback from curtain drains;
Curtain drains installed and ground water monitoring results shown;
Thorough site visit (walk-through) completed;
Minimum proposed lot size meets with DHEP and Zoning criteria;
One original plus two replacement sites delineated for each lot,
while maintaining all separation distances between replacement
sites, property lines, water supplies, water bodies, probable
building structure location, cutbanks, bluffs, etc., and in areas
having less than 25% slope;
WATER SUPPLY
Public Water Community Water Single-family Wells
D.E.C. approval of community water supply;
Known water supply problems in the area;
Water rights applied for from DNR for community wells;
Meets all separation distances;
Sources of contamination identified (dumps, chemical storage sites,
etc.;
Adequate water supply and acceptable water quality;
Review conducted by
KB5/ej/D18
Date
t ALASKA RIORR1 UAL COUROL ONO, IN.
Grp Enqineerinq 6 Enuironmental Sludies
SOILS FOR THE PROPOSED SOUTH SLOPE SUBDIVISION
Enclosed are the results of soil testing performed by Alaska
1� Environmental Control Services, Inc. (AECS), on SW 1/4, SE 1/4,
Section 24 and N 1/2, NE 1/4, Section 25.
I:T:�:e;.! .II
This area is located in the Eagle River drainage, north of
approximately Mile 7 on the Eagle River Road. A small tributary
stream is located along the eastern boundary of the subdivision.
Elevations range from 460' to 12001. Slopes over most of the
property exceed 25%.
Vegetation in the lower areas is primarily white spruce,
cottonwood, and white birch. The approximate center of the
property had been cleared of vegetation to prove up homestead
claims. Alder has pioneered in this area. The upper reaches of
the property approach treeline.
This investigation found medium dense to dense sands and gravels
in all the areas tested. No ground water was encountered.
DISCUSSION:
Tests were performed in conjunction, with the requirements set
forth in "Design Manual for On -Site Wastewater Treatment and
Disposal Systems" published by the E.P.A. The testholes were dug
by a track bulldozer with a backhoe attachment on October 31,
1984.
The objective of our testing was to determine the soils
suitability for on-site septic systems. The important soil
characteristics are: 1) Soil depth (depth to bedrock); 2) Depth
to groundwater; and 3) Percolation rate.
Refer to the Appendix for individual testhole soil logs.
SHALLON SOIL: The results of our testing indicate that bedrock
depths will not be a limitation in design and installation of
on-site systems.
1200 West 33rd Auenue, Suite B • Anchoraqe. Alaska 99503 • (907) 561-5040
SOIL WATER: No ground water was encountered.
PERCDLATION RATE: All areas tested had visually rated soils of
150 square feet per bedroom or less.
ODNCLIIS IONS :
Based on our testing we conclude that the most limiting factor
for development in the subdivision is slope. Tested areas were
chosen with 25% or less slope. However, these benches are
discontinuous and in the case of THO and 5, are approximately in
the area of a proposed access road. Good soil in TH# 6 was found
at a relatively shallow depth from 0.5' to 3.5'. An engineered
design with mounded cover and/or lift station may be necessary.
THOS 5 had good soil from 0.5' to 6.0'. Depending upon location
of the housejan engineered system with a lift station may be
required. Mich care will have to be exercised to develop this
subdivision as the selection of building sites, roads and drives
may eliminate the suitable areas for septic systems.
Sincerely,
9&-P—
Dennis Roe
Soil Scientist
Approved by:
SOILS LOG6-�-
I MUNICIPALITY OF ANCHORAGE
• ae` DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION PERCOLATION
TEST
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG — PERCOLATION TEST
PERFORMEDFOR: 71p7 BILI/wd" fFtSoCicr�PS DATE PERFORMED: 3y
LEGAL
1
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2
3 ,
4
I.
5
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8
9
10 a ,
11
12
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13-
14
15
16
17
18
19
20
COMMENTS
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TE PLAN
WAS GROUND WATER S
ENCOUNTERED? L-----
0 c
/ IF YES, ATWHAT E 5
DEPTH?
Reading
Date
Gross
Time
Net
Time
Depth to
Water
Net
Drop
PERCOLATION RATE
TEST RUN BETWEEN FT AND
c
PERFORMED BY: L CERTIFIED BV:
72-008 (6/79)
FT
DATE: '
PERFORMED
LEGAL DESCRI
2
3-
4
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5 '
6 j
8
10r
9
10-
11
12 -C-" fr
13-
14-
15-
16-
17
314151617
18
19
20
COMMENTS
Vd" SOILS LOG
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION E] PERCOLATION \,
TEST
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG - PERCOLATION TEST
DATE PERFORMED:
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SITE PLAN
WAS GROUND WATER S
ENCOUNTERED? L
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IF YES, AT WHAT E n
DEPTH?
Reading
Date
Gross
Net
Depth to
Net
Time
Time
Water
Drop
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PERCOLATION RATE - <- �iqutes(inch)
TEST RUN BETWEEN Fi AND T"
\� PERFORMED BY: L. '110f5 1\fid /.UGC" �'-F-r'- --/ CERTIFIED BY:
72-008 (6/79)
DATE:
SOILS LOG •\
MUNICIPALITY OF ANCHORAGE °
.,■ DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION PERCOLATION
TEST
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG - PERCOLATION TEST
PERFORMED FOR: (//i''. Gl�rftt-t [JI�t �l /'!5�i'CT !cr �1'S DATE PERFORMED:
LEGAL DESCRIPTION:_ 2(w SfODe :a2 /v a-
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4
5
6
7
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10
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12
13
14
15
16
17
18
19
— WAS GROUND WATER S
ENCOUNTERED? ✓IO L
O
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IF YES, AT WHAT E
DEPTH?
SITE PLAN
Reading
Date
Gross
Time
Net
Time
Depth to
Water
Net
Drop
PERCOLATION RATE
`4�
(mi hufes/inch)
/TIEST
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PERCOLATION RATE
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72-008 (6/79)
.
PERFORMED
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 2644720
SOILS LOG — PERCOLATION TEST
LEGAL DESCRIPTION:
Date
Gross
Time
Net
Time
Depth to
Water
Net
Drop
1
SP
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2
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7
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15
16
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❑ PERCOLATION
TEST
DATE PERFORMED: /n 3/ 3
WAS GROUND WATER S
ENCOUNTERED? L1 C: L
O
_ P
IF YES, AT WHAT E
DEPTH?
SITE PLAN
Reading
Date
Gross
Time
Net
Time
Depth to
Water
Net
Drop
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20 ` '
PERCOLATION RATE minutes/ inch)
�9 ) r TEST RUN BETWEEN _� FT AND FT
COMMENTS T",er.-'K7tc -1 /
PERFORMEDBV: L',7u/5 M1<%( /�U�/+'`by-'^-r_i CERTIFIED BY: L
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72-008 (6/79)
Ltd' SOILS LOG •\,
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MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION Ll PERCOLATION
TEST
/ 825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG - PERCOLATION TEST
PERFORMED FOR: Cr GK/E-lcafnfr DATE PERFORMED:
LEGAL DESCRIPTION:��I�r a,jlEY��ee.
SLOPE SITE PLAN
4-
5 4 5
6
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7
8
9
10-
11
0 11
12
13
14
15
16
17-
18-
19-
20-
COMMENTS
7181920COMMENTS i�Cl
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WAS GROUND WATER
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6
I F YES, AT WHAT
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Reading
to
Gross
Time
Net
Time
Depth to
Water
Net
Drop
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5 4 5
6
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7
8
9
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12
13
14
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16
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COMMENTS
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WAS GROUND WATER
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6
I F YES, AT WHAT
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Reading
to
Gross
Time
Net
Time
Depth to
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PERCOLATION RATE�� ��,-_ (minutes/inch)
TEST RUN BETWEEN ".eT AND ••, FT
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/ �• t �
PERFORMED BV.�tw'riali TG -z //��1_ F`" CE RTIFIED BY•'
7 2.00 8 (6/79)
MUNICIPALITY OF ANCHORAGE
'0 +.r;.. DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG —PERCOLATION TEST
PERFORMED
LEGAL DESCRIPTION:/Ij2?/ f"�
7off' l lJ/G A#"
3
4
5
6
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7
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9
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10 1
11
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12
13
14
15
16
17
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19
20
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11-� SOILS LOG
❑ PERCOLATION
TEST
DATE PERFORMED: ¢7- 3/-S
WAS GROUND WATER S
/ ENCOUNTERED? //1 ✓ LO
o P
IF YES, AT WHAT E
DEPTH?
SITE PLAN
Reading
Date
Gross
Net
Depth to
Net
Time
Time
Water
Drop
PERCOLATION RATE-.:'" "• Jwainutes/inch)
TEST RUN BETWEEN �' FT AND .FT,
/ PERFORMED BY: jN-oal5 KO< /LIF,A CERTIFIED BY:
72-008 (6/79)
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